This is the best flash game I've ever played. Geniuely terrifying and great fun. I played through Run 'n' Gun mode first and I can't wait to go through in Survivor mode.
The one thing that I didn't expect was to have an attachment to my companions. Kelly got mauled on the way out of Hank's apartment building and I was pretty sad. But Hank made it right up until the Stadium where he was gunned down by the soliders and it only added to the tension in the situation.
I really hope that there is a sequel at some point. The Last Stand series has always been one of my favorites.